PageSpeed Checker — Test Core Web Vitals & Load Time
Check PageSpeed scores and Core Web Vitals (LCP, CLS, INP) for any URL. Get actionable recommendations to improve load time. Free Google PageSpeed tool.
What is a PageSpeed Checker?
The PageSpeed Score Checker uses the Google PageSpeed Insights API to fetch the overall Performance score for any URL — the single 0–100 number that summarises weighted lab metrics for speed, interactivity, and visual stability. Desktop and mobile scores are shown side by side, alongside the top opportunities and diagnostics pulling the score down, in a clean single-page view suited to quick checks and client reporting.
When Should You Use PageSpeed Checker?
Use this when you need a fast performance benchmark — before and after an optimisation, during a client presentation, or when comparing your score against a direct competitor. The PageSpeed score is a useful headline metric for communicating technical performance to stakeholders who do not need a full metric breakdown. It is also the fastest way to confirm whether a developer's change actually moved the needle.
How to Read PageSpeed Checker Results
A score of 90 and above is Good. 50–89 is Needs Improvement. Below 50 is Poor. Mobile scores are almost always lower than desktop, but a mobile score below 50 is a meaningful signal that the page has performance problems affecting real users on slower connections. Focus on the Opportunities section — these are the specific issues with the highest potential score gain and are listed in order of estimated impact.
What Should You Know Before Using PageSpeed Checker?
Run this on your most important landing pages and compare mobile versus desktop. If mobile is 30 or more points below desktop, investigate render-blocking resources, unoptimised images, and JavaScript execution time as the most likely causes. Use this tool for before-and-after comparisons after specific changes — each check is live and reflects the current deployed state of the page, not a cached result.
Frequently Asked Questions
What is Google PageSpeed Insights?
Google PageSpeed Insights is a free Google tool that analyses a web page's performance using data from the Chrome User Experience Report (field data) and Lighthouse lab testing. It produces a Performance score from 0–100 and provides specific recommendations for improving load speed, interactivity, and visual stability.
What is a good PageSpeed score?
Google categorises PageSpeed scores as Good (90–100), Needs Improvement (50–89), and Poor (0–49). A score of 90+ is the target for most sites. Mobile scores are typically 20–30 points lower than desktop — a mobile score below 50 indicates meaningful performance issues affecting users on slower connections.
What is the difference between lab data and field data in PageSpeed?
Lab data is measured in a controlled Lighthouse simulation using fixed conditions. Field data (from the Chrome User Experience Report) reflects real user measurements aggregated over 28 days on actual devices and connections. Field data is what Google uses for ranking decisions — lab data is useful for diagnosing the causes of field data issues.
How do I improve my PageSpeed score?
The PageSpeed Checker's Opportunities section lists specific issues ordered by estimated score improvement. The most impactful fixes are typically: optimising image formats and sizes (convert to WebP/AVIF), eliminating render-blocking resources, enabling text compression, reducing unused JavaScript, and improving server response time (TTFB).
Does PageSpeed score affect Google rankings?
Page experience signals — including Core Web Vitals (LCP, CLS, INP) — are confirmed Google ranking factors. The PageSpeed score itself is not directly used for ranking, but it strongly correlates with Core Web Vitals performance. Improving your score almost always improves the underlying metrics that do affect rankings.
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